Add an option to exclude `[click]` markers from exported notes

[gy-mate]

Is your feature request related to a problem? Please describe. I do not see the point in including [click] markers in exported notes if the presentation itself isn't exported with the --with-clicks option.

Describe the solution you'd like An option for slidev export-notes to exclude [click] markers from exported notes. Or if exporting notes would be integrated into the slidev export command (by a new --with-notes option) this behavior could be linked to the --with-clicks option.

[kermanx]

I think we may not include this as a built-in feature. However, we can make some improvements to the print logic, then there will be a very simple workaround.